Conveyor system having a knock-down device that reorients stacked objects into a sequential orientation

• US 10,046,913 B1
• Filed: 05/05/2017
• Issued: 08/14/2018
• Est. Priority Date: 05/05/2017
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Vadakkanmaruveedu, Unnikrishnan, Battles, Jon Stuart, Dunne, Emily, Garrett, Samuel Gardner, Talda, Timothy Alan, Tilekar, Akshay Rajendra, Underberg, Jacqueline
• Primary Examiner(s): Hess, Douglas A
• Application Number:
  US15/587,712
• Time in Patent Office: 466 Days
• Field of Search: 198442, 198633, 198635
• CPC Class Codes: B65G 47/883 Fixed stop
• CPC Class Codes: B65G 59/12 characterised by de-stacking during transit

Abstract

In one embodiment, a conveyor system has a conveyor segment and a knock-down device. The conveyor segment has an upstream end, and a downstream end opposite the upstream end. The conveyor segment defines a conveying surface that carries objects along a flow direction that extends from the upstream end to the downstream end. The knock-down device has a knock-down body that is spaced entirely from the conveying surface along a vertical direction by at least a clearance height. The knock-down body has an upstream body end, a downstream body end offset from the upstream body end with respect to the flow direction, and a ramped surface that extends between the upstream body end and the downstream body end. The ramped surface is ramped away from the conveying surface as the ramped surface extends along the flow direction, and knocks down objects that are stacked on top of one another.

Claims

1. A conveyor system configured to reorient objects from a stacked orientation to a sequential orientation, the conveyor system comprising:

a conveyor segment having an upstream end, a downstream end opposite the upstream end along a flow direction of the conveyor segment, a pair of lateral sides that oppose one another along a lateral direction that is perpendicular to the flow direction, a top side, and a bottom side that opposes the top side along a vertical direction that is perpendicular to both the flow direction and the lateral direction, the conveyor segment defining a conveying surface configured to carry objects along the flow direction; and

a knock-down device having a knock-down body and at least one support member that supports the knock-down body such that the knock-down body is spaced entirely from the conveying surface along the vertical direction by at least a clearance height, the knock-down body having an upstream body end, a downstream body end offset from the upstream body end with respect to the flow direction, and a ramped surface that extends from the upstream body end to the downstream body end, the ramped surface being ramped away from the conveying surface as the ramped surface extends along the flow direction,

wherein, when the conveying surface carries a first object having a first height less than the clearance height along the vertical direction, and carries a second object stacked on top of the first object, the first and second objects having a combined stacked height along the vertical direction that is greater than the clearance height, the first object passes under the knock-down body, and the ramped surface impedes a path of the second object along the flow direction so as to separate the second object from the first object.

2. The conveyor system of claim 1, wherein the ramped surface is planar as it extends from the upstream body end to the downstream body end.

3. The conveyor system of claim 1, wherein the ramped surface is curved from the upstream body end to the downstream body end.

4. The conveyor system of claim 3, wherein the ramped surface is convex as it extends from the upstream body end to the downstream body end.

5. A conveyor system, comprising:

a conveyor segment having an upstream end, and a downstream end opposite the upstream end, the conveyor segment defining a conveying surface configured to carry objects along a flow direction that extends from the upstream end to the downstream end; and

a knock-down device having knock-down body that is spaced entirely from the conveying surface along a vertical direction by at least a clearance height, the knock-down body having an upstream body end, a downstream body end offset from the upstream body end with respect to the flow direction, and a ramped surface that extends between the upstream body end and the downstream body end, the ramped surface being ramped away from the conveying surface as the ramped surface extends along the flow direction.

6. The conveyor system of claim 5, wherein the ramped surface is planar between the upstream body end and the downstream body end.

7. The conveyor system of claim 5, wherein the ramped surface is curved between the upstream body end and the downstream body end.

8. The conveyor system of claim 7, wherein the ramped surface is convex as it extends between the upstream end and the downstream end.

9. The conveyor system of claim 8, wherein the ramped surface has an upstream edge at the upstream end, the upstream edge extending from the first lateral side to the second lateral side so as to define the clearance height.

10. The conveyor system of claim 7, wherein the knock-down body has a first lateral side and a second lateral side spaced from one another along a lateral direction, and the ramped surface extends from the first lateral side to the second lateral side.

11. The conveyor system of claim 10, wherein the conveyor segment has a first lateral side and a second lateral side spaced from one another along the lateral direction, and the conveying surface and knock-down body each have a width along the lateral direction, the width of the knock-down body being greater than or equal to the width of the conveying surface.

12. The conveyor system of claim 5, comprising at least one support member configured to support the knock-down body over the conveying surface.

13. The conveyor system of claim 12, wherein each of the at least one support members is a leg that extends down from the knock-down body along the vertical direction.

14. The conveyor system of claim 13, wherein the conveyor segment has a first lateral side and a second lateral side spaced from one another along a lateral direction, the conveying surface has a width along the lateral direction, and the at least one support member includes a pair of legs spaced from one another along the lateral direction by a distance, the distance between the pair of legs being greater than the width of the conveying surface.

15. The conveyor system of claim 5, wherein at least one conveyor level of the conveyor system includes a vibrating conveyor segment having a vibrating conveying surface and a plurality of rollers under the vibrating conveying surface, each of the plurality of rollers having a plurality of cam members spaced along a lateral direction, perpendicular to the flow direction and the vertical direction, each cam member configured to contact the vibrating conveying surface so as to cause the vibrating conveying surface to undulate.

16. A method of reorienting objects from a stacked orientation to a sequential orientation, the method comprising:

(a) carrying a first object on a conveying surface of a conveyor segment along a flow direction, the first object having a first height along a vertical direction;

(b) carrying a second object stacked on top of the first object, the first and seconds objects having a combined height along the vertical direction;

(c) passing the first object on the conveying surface under a knock-down body of a knock-down device along the flow direction, the knock-down body being spaced entirely over the conveying surface along the vertical direction by at least a clearance height that is greater than the first height and less than the combined height; and

(d) impeding a path of the second object along the flow direction with a ramped surface of the knock-down body so as to allow the first object to separate from the second object as the first object passes under the knock-down body, the ramped surface extending away from the conveying surface as the ramped surface extends along the flow direction.

17. The method of claim 16, wherein step (d) comprises the second object translating up the ramped surface until the first object passes under the knock-down body, and the second object translating back down the ramped surface and onto the conveying surface behind the first object.

18. The method of claim 17, comprising (e) passing the second object on the conveying surface in the flow direction under the knock-down body.

19. The method of claim 16, wherein the ramped surface is curved as it extends along the flow direction.